JP2016040855A - Radio communication system, base station device, terminal device, radio communication method, and integrated circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a terminal device to perform efficient uplink data transmission.SOLUTION: A terminal device notifies a base station device of transmission capability information on a terminal device including frequency band information indicating the combination of transmittable frequency bands, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction given by a base station device. The base station device sets carrier aggregation used by switching a plurality of uplink frequency bands to the terminal device on the basis of the transmission capability information, and schedules the uplink to the terminal device on the basis of the transmission capability information on the terminal device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a base station device, a terminal device, and a radio communication system, and more specifically, a radio communication system, a base station device, a terminal device, a radio communication method, and integration in an operation at the time of notification of uplink transmission timing Regarding the circuit.

  In the 3rd Generation Partnership Project (3GPP), the W-CDMA system is standardized as a third generation cellular mobile communication system, and services are started sequentially. Also, HSDPA with higher communication speed has been standardized and is being serviced.

  On the other hand, in 3GPP, standardization of the evolution of third generation radio access (Evolved Universal Terrestrial Radio Access; hereinafter referred to as “EUTRA”) has also been performed, and the service has been started. As a downlink communication system of EUTRA, an OFDM (Orthogonal Frequency Division Multiplexing) system that is resistant to multipath interference and suitable for high-speed transmission is adopted. Also, as an uplink communication method, considering the cost and power consumption of the mobile station device, a single carrier frequency division multiplexing SC-FDMA (Peak to Average Power Ratio) PA-PDM (Peak to Average Power Ratio) can be reduced. A Single Carrier-Frequency Division Multiple Access (DFT) Discrete Fourier Transform (spread Fourier transform) -spread OFDM system is employed.

  In 3GPP, standardization work for Advanced-EUTRA, which is a further evolution of EUTRA, is also being carried out. In Advanced-EUTRA, it is assumed that communication at a maximum transmission rate of 1 Gbps or higher and 500 Mbps or higher of the uplink is performed using a bandwidth of up to 100 MHz bandwidth in the uplink and downlink.

  In Advanced-EUTRA, it is considered that a 100 MHz band is realized by bundling a plurality of 20 MHz bands of EUTRA so that EUTRA mobile station apparatuses can be accommodated. In Advanced-EUTRA, one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC). The component carrier is also called a cell. In addition, bundling a 20 MHz band is called carrier aggregation (CA) (Non-patent Document 1).

  In Advanced-EUTRA, for a mobile station device that is not capable of transmitting to two or more uplink component carriers at the same time, the base station device sets carrier aggregation, and the mobile station device issues an instruction from the base station device. A method for transmitting data by switching a component carrier every time according to the above has been proposed.

  This method is called “Time-Switched UL CA” (Non-Patent Document 2). Note that this method also causes interference between carriers when transmitting to two or more uplink component carriers at the same time for a mobile station apparatus capable of transmitting to two or more uplink component carriers at the same time. It has also been shown to be effective in an environment where communication is affected.

3GPP TS (Technical Specification) 36.300, V11.3.0 (2012-09), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Overall description Stage2 R2-123997, NTT DOCOMO, Fujitsu, NEC, Panasonic, “Introduction of 1CC transmission in a TTI for UL CA”, 3GPP TSG-RAN WG2 # 79, Qingdao, China, 13-17 August, 2012

  If the mobile station apparatus transmits data by switching the uplink component carrier every time according to the instruction from the base station apparatus, the base station apparatus has the capability of transmitting data while switching the uplink component carrier If not known, the base station apparatus cannot instruct the mobile station apparatus to switch the component carrier.

  The present invention relates to a method in which a mobile station apparatus switches data between component carriers every time in accordance with an instruction from the base station apparatus, and the base station apparatus efficiently controls the mobile station apparatus and the base station. An object is to provide an apparatus, a wireless communication system, a wireless communication method, and an integrated circuit.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the wireless communication system of the present invention is a wireless communication system in which a base station device and a terminal device communicate with each other, and the terminal device includes frequency band information indicating a combination of frequency bands that can be transmitted, and the frequency band. A plurality of uplink frequency bands indicated by the information are notified to the base station apparatus of transmission capability information of a terminal apparatus including frequency switching availability information indicating whether switching is possible according to an instruction of the base station apparatus, and the base station apparatus Is configured to set carrier aggregation to be used by switching the plurality of uplink frequency bands in the terminal device based on the transmission capability information.

  (2) Moreover, the base station apparatus of the present invention is a base station apparatus that communicates with a terminal apparatus, and is indicated by frequency band information indicating a combination of frequency bands that can be transmitted from the terminal apparatus, and the frequency band information. Receiving the transmission capability information of the terminal device including frequency switching availability information indicating whether switching is possible according to the instruction of the base station device, and based on the transmission capability information, the terminal device The carrier aggregation for switching and using the plurality of uplink frequency bands is set.

  (3) The terminal device of the present invention is a terminal device that is assigned a plurality of cells from the base station device and communicates with the base station device, and indicates a combination of frequency bands that can be transmitted to the base station device. Notifying the transmission capability information of the terminal device including frequency band information and frequency switching enable / disable information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station device. Features.

  (4) Moreover, the terminal device of this invention notifies the transmission capability information regarding the processing time of frequency switching, It is characterized by the above-mentioned.

  (5) The radio communication method of the present invention is a radio communication method applied to a radio communication system in which a base station apparatus and a terminal apparatus communicate with each other, and the terminal apparatus has a combination of transmittable frequency bands. Transmission capability information of the terminal apparatus including frequency band information indicating the frequency switching availability information indicating whether or not the plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus. Notifying a station apparatus, and the base station apparatus includes at least a step of setting carrier aggregation to be used by switching the plurality of uplink frequency bands to the terminal apparatus based on the transmission capability information. It is characterized by.

  (6) The integrated circuit of the present invention is an applied integrated circuit applied to a base station apparatus that communicates with a terminal device, and frequency band information indicating a combination of frequency bands that can be transmitted from the terminal device. And means for receiving transmission capability information of the terminal device including frequency switching availability information indicating whether switching is possible according to an instruction from the base station device, and a plurality of uplink frequency bands indicated by the frequency band information, and the transmission It is characterized by having means for determining whether to set carrier aggregation in the terminal device based on capability information, and means for setting carrier aggregation in the terminal device.

  (7) The integrated circuit of the present invention is an integrated circuit that is applied to a terminal device that is assigned a plurality of cells from a base station device and communicates with the base station device, and is capable of transmitting to the base station device. Transmission capability of a terminal apparatus including frequency band information indicating a combination of frequency bands and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus It has a means to notify information, It is characterized by the above-mentioned.

  According to the present invention, the mobile station apparatus notifies the base station apparatus of the transmission capability information of the mobile station apparatus, so that the base station apparatus efficiently transmits the mobile station apparatus to the mobile station apparatus based on the transmission capability information of the mobile station apparatus. Thus, carrier aggregation setting and uplink scheduling can be performed.

It is a figure which shows the structure of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the base station apparatus which concerns on embodiment of this invention. It is a figure which shows the procedure which notifies the transmission capability information of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the procedure which notifies the transmission capability information of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the procedure which notifies the transmission capability information of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the procedure which notifies the transmission capability information of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the physical channel structure in EUTRA. It is a figure which shows the structure of the uplink in EUTRA. It is explanatory drawing about the component carrier of the downlink in Advanced-EUTRA. It is explanatory drawing about the component carrier of the uplink in Advanced-EUTRA. It is explanatory drawing about the protocol stack which handles the control data of the mobile station apparatus and base station apparatus of EURTA.

  The downlink physical channel of EUTRA includes a downlink reference signal (Downlink Reference Signal), a downlink synchronization signal (Downlink Synchronization Signal), a downlink shared channel PDSCH (Physical Downlink Shared Channel), a downlink control channel PDCCH (Physical Downlink Control). Channel) and broadcast channel PBCH (Physical Broadcast Channel).

  The uplink physical channel of EUTRA includes an uplink reference signal, a random access channel PRACH (Physical Random Access Channel), an uplink shared channel PUSCH (Physical Uplink Shared Channel), and an uplink control channel PUCCH (Physical Uplink). Control Channel). In addition, the uplink reference signal includes two types of signals, a demodulation reference signal (Demodulation Reference Signal) and a measurement reference signal (Sounding Reference Signal).

  FIG. 7 is a diagram illustrating a physical channel configuration in EUTRA, and FIG. 8 is a diagram illustrating an uplink configuration in EUTRA. One block is composed of 12 subcarriers and 7 OFDM symbols. Then, one resource block (RB) is configured using two blocks. The uplink shared channel PUSCH and the uplink control channel PUCCH are used in units of one resource block. The random access channel PRACH is configured using 6 resource blocks.

  The uplink reference signal is arranged in a specific OFDM symbol in the resource block. Each uplink channel is divided into an uplink shared channel PUSCH region, an uplink control channel PUCCH region, and a random access channel PRACH as shown in FIG. Information on each region of the uplink shared channel PUSCH and the uplink control channel PUCCH is broadcast from the base station apparatus. Further, the base station apparatus allocates radio resources of the uplink shared channel PUSCH and the uplink control channel PUCCH for each mobile station apparatus from each region. The random access channel RACH is arranged at a constant period.

  The downlink shared channel PDSCH is used for transmission of user data and control data from the base station apparatus to the mobile station apparatus. The downlink control channel PDCCH is used for notification of control information such as radio resource allocation information of the downlink shared channel PDSCH and the uplink shared channel PUSCH from the base station apparatus to the mobile station apparatus. The downlink reference signal is used to demodulate the downlink shared channel PDSCH and the downlink control channel PDCCH. The downlink synchronization signal is used by the mobile station apparatus for downlink synchronization. The broadcast channel PBCH is used to notify information related to the system information of the cell of the base station device.

  The uplink shared channel PUSCH is used for transmitting user data and control data from the mobile station apparatus to the base station apparatus. The data transmitted and received on the uplink shared channel PUSCH and the downlink shared channel PDSCH is subjected to HARQ (Hybrid Automatic Repeat reQuest) processing, and the data at the time of retransmission is performed by combining the initial transmission data and the retransmission data at the time of retransmission. Has improved the error correction ability. The uplink control channel PUCCH is used to notify control information such as a response (ACK (Acknowledge) / NACK (Negative acknowledge)) to downlink data from the base station apparatus and downlink radio channel quality information. The

  The random access channel PRACH is mainly used for random access preamble transmission for acquiring uplink transmission timing information from the mobile station apparatus to the base station apparatus. Random access preamble transmission is performed in a random access procedure. The reference signal for demodulation of the uplink reference signal is used by the base station device to demodulate the uplink shared channel PUSCH, and is inserted into the fourth symbol position and the 11th symbol position of the uplink shared channel PUSCH. The reference signal for measuring the uplink reference signal is used by the base station apparatus to measure the uplink radio channel quality, and is inserted into the 14th symbol position of the uplink shared channel PUSCH. The radio resource for transmitting the measurement reference signal is allocated from the base station device to each mobile station device.

  The random access procedure includes two access procedures: a contention based random access procedure and a non-contention based random access procedure (Non-Patent Document 1).

  The contention-based random access procedure is a random access procedure that may collide between mobile station devices, and the contention-based random access procedure is performed at the time of initial access from a state in which the mobile station device is not connected (communication) with the base station device. This is performed for a scheduling request or the like when uplink data transmission is generated in the mobile station apparatus while being connected to the station apparatus but not in uplink synchronization.

  The non-contention based random access procedure is a random access procedure in which no collision occurs between mobile station devices, and the base station device and the mobile station device are connected but move quickly when the uplink is out of synchronization. The base station apparatus notifies the mobile station apparatus of random access instruction information in special cases such as when handover or the transmission timing of the mobile station apparatus is not effective in order to establish uplink synchronization between the station apparatus and the base station apparatus. As a result, the mobile station apparatus starts a random access procedure (Non-Patent Document 1). The non-contention based random access procedure is instructed by an RRC (Radio Resource Control: Layer 3) layer message and control data of the downlink control channel PDCCH.

  Also, 3GPP has begun discussions on Advanced-EUTRA, a further evolution of EUTRA. In Advanced-EUTRA, it is assumed that communication is performed at a maximum transmission rate of 1 Gbps or more and 500 Mbps or more of the uplink using a band up to a maximum of 100 MHz bandwidth in the uplink and the downlink.

  FIG. 9 is an explanatory diagram of a configuration of a downlink component carrier at the time of carrier aggregation in Advanced-EUTRA. FIG. 10 is an explanatory diagram of a configuration of an uplink component carrier at the time of carrier aggregation in Advanced-EUTRA.

  In Advanced-EUTRA, it is considered that a maximum of 100 MHz band is realized by bundling a plurality of bands of 20 MHz or less of EUTRA so that EUTRA mobile station apparatuses can be accommodated. In Advanced-EUTRA, one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC) (Non-Patent Document 1). Further, one cell is configured by combining one downlink component carrier and one uplink component carrier. A single cell can be configured with only one downlink component carrier.

  That is, the base station apparatus allocates a plurality of cells that match the communication capability and communication conditions of the mobile station apparatus, and communicates with the mobile station apparatus via the allocated plurality of cells. In the plurality of cells allocated to the mobile station apparatus, one cell is a first cell (Primary Cell) and the other cells are second cells (Secondary Cell). Special functions such as allocation of the uplink control channel PUCCH and permission to access the random access channel PRACH are set in the first cell.

  Further, in order to reduce the power consumption of the mobile station apparatus, the mobile station apparatus does not perform reception processing of the downlink shared channel PDSCH and the downlink control channel PDCCH (or downlink control) for the second cell immediately after allocation. The radio resource allocation information indicated by the channel PDCCH is not followed), the downlink shared channel PDSCH and the downlink control channel for the second cell for which activation is instructed after the activation is instructed from the base station apparatus PDCCH reception processing is started (or according to radio resource allocation information indicated by the downlink control channel PDCCH).

  In addition, the mobile station apparatus is instructed to deactivate the second cell activated by the base station apparatus, and then the downlink shared channel PDSCH and the second cell instructed to deactivate. The reception process of the downlink control channel PDCCH is stopped (or the radio resource allocation information indicated by the downlink control channel PDCCH is not followed).

  The second cell that is instructed to be activated by the base station device and receives the downlink shared channel PDSCH and the downlink control channel PDCCH is called an activated cell, and is assigned from the base station device to the mobile station device. The second cell immediately after that is instructed to deactivate and the second cell that stops the reception processing of the downlink shared channel PDSCH and the downlink control channel PDCCH is referred to as a deactivated cell. The first cell is always an activated cell.

  Further, when a mobile station apparatus communicates with a base station apparatus using a plurality of cells, the mobile station apparatus may connect to the base station apparatus via a repeater (Repeater) or the like. In such a case, both or one of the reception timing of the downlink component carrier in the mobile station apparatus and the transmission timing to the base station apparatus for each uplink component carrier is different for each cell. In particular, when the transmission timing to the base station apparatus for each uplink component carrier is different, the mobile station apparatus groups cells having the same transmission timing, and adjusts the transmission timing for each group.

  A group composed of cells having the same transmission timing is called a transmission timing group. The base station apparatus notifies the mobile station apparatus of transmission timing group configuration information, and the mobile station apparatus sets a transmission timing group from the transmission timing group configuration information and manages uplink transmission timing for each transmission timing group. To do.

  FIG. 11 shows a protocol stack for handling control data of the mobile station apparatus and base station apparatus of EURTA. FIG. 11 will be described below.

  A physical layer (PHY layer) provides a transmission service to an upper layer using a physical channel. The PHY layer is connected to an upper medium access control layer (Medium Access Control layer: MAC layer) by a transport channel. Data moves between the MAC layer, the PHY layer, and the layer (layer) via the transport channel. Data transmission / reception is performed between the mobile station apparatus and the base station apparatus via a physical channel.

  The MAC layer maps various logical channels to various transport channels. The MAC layer is connected to an upper radio link control layer (Radio Link Control layer: RLC layer) through a logical channel. The logical channel is roughly classified according to the type of information to be transmitted, and is divided into a control channel for transmitting control information and a traffic channel for transmitting user information.

  The RLC layer divides and concatenates data received from the upper layer, and adjusts the data size so that the lower layer can transmit data appropriately. The RLC layer also has a function for guaranteeing QoS (Quality of Service) required by each data. That is, the RLC layer has functions such as data retransmission control.

  A packet data convergence protocol layer (PDCP layer) has a header compression function for compressing unnecessary control information in order to efficiently transmit IP packets as user data in a wireless section. The PDCP layer also has a data encryption function.

  The radio resource control layer (Radio Resource Control layer: RRC layer) defines only control information. The RRC layer sets and resets a radio bearer (RB), and controls a logical channel, a transport channel, and a physical channel. The RB is divided into a control data radio bearer (Signaling Radio Bearer: SRB) and a data radio bearer (Data Radio Bearer: DRB), and the SRB is used as a path for transmitting an RRC message as control information. DRB is used as a route for transmitting user information. Each RB is set between the RRC layers of the base station apparatus and the mobile station apparatus.

  The PHY layer corresponds to the physical layer of the first layer in the hierarchical structure of the generally known Open Systems Interconnection (OSI) model, and the MAC layer, RLC layer, and PDCP layer are OSI. The RRC layer corresponds to the data link layer, which is the second layer of the model, and the network layer, which is the third layer of the OSI model.

[Configuration explanation]
FIG. 1 is a diagram illustrating a configuration of a mobile station apparatus according to an embodiment of the present invention. The mobile station apparatuses 1-1 to 1-3 include a data generation unit 101, a transmission data storage unit 103, a transmission HARQ processing unit 105, a transmission processing unit 107, a radio unit 109, a reception processing unit 111, a reception HARQ processing unit 113, and a MAC. The information extraction unit 115, the MAC control unit 119, the data processing unit 121, and the RRC control unit 123 are configured.

  User data from the upper layer and control data from the RRC control unit 123 are input to the data generation unit 101. The data generation unit 101 has functions of a PDCP layer and an RLC layer. The data generation unit 101 performs processing such as header compression of the IP packet of user data, data encryption, data division and combination, and adjusts the data size. The data generation unit 101 outputs the processed data to the transmission data storage unit 103.

  The transmission data storage unit 103 accumulates the data input from the data generation unit 101 for each logical channel, and transmits the data of the specified logical channel based on the instruction from the MAC control unit 119 for the specified data amount. The data is output to the HARQ processing unit 105. In addition, the transmission data storage unit 103 outputs information on the amount of accumulated data for each logical channel to the MAC control unit 119.

  The transmission HARQ processing unit 105 encodes input data and performs puncture processing on the encoded data. Then, transmission HARQ processing section 105 outputs the punctured data to transmission processing section 107, and stores the encoded data. The transmission HARQ processing unit 105, when instructed to retransmit data from the MAC control unit 119, performs a puncture process different from the previously performed puncture from the stored encoded data, and transmits the punctured data to the transmission processing unit 107. Output to.

  The transmission processing unit 107 modulates and encodes the data input from the transmission HARQ processing unit 105. The transmission processing unit 107 performs DFT (Discrete Fourier Transform) -IFFT (Inverse Fast Fourier Transform) processing on the modulated and encoded data, and after processing, CP (Cyclic prefix) Is inserted into the physical uplink shared channel (PUSCH) of each uplink component carrier (cell) and output to the radio section 111. In addition, when there is a response instruction for received data from the PHY control unit 117, the transmission processing unit 107 generates an ACK or NACK signal, places the generated signal in the physical uplink control channel (PUCCH), and transmits the radio unit 109. Output to.

  The radio unit 109 up-converts the data input from the transmission processing unit 107 to the radio frequency of the transmission position information (transmission cell information) instructed from the PHY control unit 117, adjusts the transmission power, and transmits the data from the transmission antenna. Send. Radio section 109 down-converts the radio signal received from the reception antenna and outputs the result to reception processing section 111.

  The reception processing unit 111 performs FFT (Fast Fourier Transform) processing, decoding, demodulation processing, and the like on the signal input from the wireless unit 109. The reception processing unit 111 outputs physical downlink shared channel (PDSCH) data among the demodulated data to the reception HARQ processing unit 113. Also, the reception processing unit 111 receives response information (ACK / NACK) of uplink transmission data of control data acquired from the physical downlink control channel PDCCH among the demodulated data and uplink transmission permission information (Uplink grant: uplink). Grant) to the MAC control unit 119. The uplink transmission permission information includes data modulation / coding scheme, data size information, HARQ information, transmission position information, and the like.

  The reception HARQ processing unit 113 performs a decoding process on the input data from the reception processing unit 111, and outputs the data to the MAC information extraction unit 115 when the decoding process is successful. The reception HARQ processing unit 113 stores the data that has failed in the decoding process when the decoding process of the input data has failed. When receiving the retransmission data, the reception HARQ processing unit 113 combines the stored data and the retransmission data and performs a decoding process. Further, the reception HARQ processing unit 113 notifies the MAC control unit 119 of success or failure of the input data decoding process.

  The MAC information extraction unit 115 extracts MAC layer (Medium Access Control layer) control data from the data input from the reception HARQ processing unit 113, and outputs the extracted control information to the MAC control unit 119. The MAC information extraction unit 115 outputs the remaining data to the data processing unit 121. The data processing unit 121 has functions of a PDCP layer and an RLC layer, performs a decompression function of a compressed IP header, a decryption function of encrypted data, a data division and combination, and the like, and converts the data into an original form Return to. The data processing unit 121 divides the RRC message and user data, outputs the RRC message to the RRC control unit 123, and outputs the user data to the upper layer.

  The PHY control unit 117 controls the transmission processing unit 107, the radio unit 109, and the reception processing unit 111 according to an instruction from the MAC control unit 119. The PHY control unit 117 notifies the transmission processing unit 109 of the modulation / coding scheme and the transmission position from the modulation / coding scheme, transmission power information and transmission position information (transmission cell information) notified from the MAC control unit 119, The radio unit 109 is notified of the frequency information and transmission power information of the transmission cell.

  The MAC control unit 119 determines the data of each logical channel based on the data amount information for each logical channel acquired from the transmission data storage unit 103 and the transmission data size indicated by the uplink transmission permission information acquired from the reception processing unit 111. The transmission priority is determined, and the transmission data storage unit 103 is notified of the logical channel to be transmitted and the amount of data. Also, the MAC control unit 119 notifies the transmission HARQ processing unit 105 of HARQ information, and outputs the modulation / coding scheme and transmission position information (transmission cell information) to the PHY control unit 117.

  Further, the MAC control unit 119 obtains response information for the uplink transmission data from the reception processing unit 111, and when the response information indicates NACK (non-response), retransmits to the transmission HARQ processing unit 105 and the PHY control unit 117. Instruct. When acquiring the success / failure information of the data decoding process from the reception HARQ processing unit 113, the MAC control unit 119 instructs the PHY control unit 117 to transmit an ACK or NACK signal.

  The MAC control unit 119 has a MAC layer function, and acquires activation / deactivation instruction information and DRX control information of a cell (or component carrier) in the MAC control information input from the MAC information extraction unit 115 In this case, the PHY control unit 117 is controlled to control the radio unit 109, the transmission processing unit 107, and the reception processing unit 111 in order to perform activation / deactivation control and DRX control.

  The MAC control unit 119 outputs transmission timing information among the MAC control information input from the MAC information extraction unit 115 to the PHY control unit 117. The MAC control unit 119 manages the transmission timing group information input from the RRC control unit 123 and controls the PHY control unit 117.

  The RRC control unit 123 performs various settings for communicating with the base station apparatus 3 such as connection / disconnection processing with the base station apparatus 3, setting of carrier aggregation, setting of transmission timing groups, and the like. The RRC control unit 123 exchanges information with an upper layer associated with the various settings, and controls a lower layer associated with the various settings.

  The RRC control unit 123 creates an RRC message and outputs the created RRC message to the data generation unit 101. The RRC control unit 123 analyzes the RRC message input from the data processing unit 121. The RRC control unit 123 creates a message indicating the transmission capability of the mobile station apparatus and outputs the message to the data generation unit 101. Further, the RRC control unit 123 outputs information necessary for the MAC layer to the MAC control unit 119 and outputs information necessary for the physical layer to the PHY control unit 117.

  The transmission processing unit 107, the radio unit 109, the reception processing unit 111, and the PHY control unit 117 perform physical layer operations. The transmission data storage unit 103, the transmission HARQ processing unit 105, the reception HARQ processing unit 113, the MAC information extraction unit 115, and the MAC control unit 119 perform operations of the MAC layer. The data generation unit 101 and the data processing unit 121 perform operations of the RLC layer and the PDCP layer. The RRC control unit 123 operates the RRC layer.

  FIG. 2 is a diagram illustrating a configuration of the base station apparatus according to the embodiment of the present invention. The base station apparatus 3 includes a data generation unit 201, a transmission data storage unit 203, a transmission HARQ processing unit 205, a transmission processing unit 207, a radio unit 209, a reception processing unit 211, a reception HARQ processing unit 213, a MAC information extraction unit 215, and a PHY. The controller 217, the MAC controller 219, the data processor 221, and the RRC controller 223 are configured.

  User data from the upper layer and control data from the RRC control 223 are input to the data generation unit 201. The data generation unit 201 has functions of a PDCP layer and an RLC layer, and performs processing such as header compression of the IP packet of user data, data encryption, data division and combination, and adjusts the data size. The data generation unit 201 outputs the processed data and the logical channel information of the data to the transmission data storage unit 203.

  The transmission data storage unit 203 accumulates the data input from the data generation unit 201 for each user, and transmits the user data instructed based on the instruction from the MAC control unit 219 for the specified data amount. The data is output to the unit 205. In addition, the transmission data storage unit 203 outputs information on the amount of data stored for each logical channel to the MAC control unit 219.

  The transmission HARQ processing unit 205 encodes input data and performs puncture processing on the encoded data. Then, transmission HARQ processing section 205 outputs the punctured data to transmission processing section 207, and stores the encoded data. The transmission HARQ processing unit 205, when instructed to retransmit data from the MAC control unit 219, performs a puncture process different from the previously performed puncture from the stored encoded data, and transmits the punctured data to the transmission processing unit 207. Output to.

  The transmission processing unit 207 modulates and encodes the data input from the transmission HARQ processing unit 205. The transmission processing unit 207 maps the modulated and encoded data to signals such as physical downlink control channel PDCCH, downlink synchronization signal, physical broadcast channel PBCH, physical downlink shared channel PDSCH and the like of each cell, The mapped data is subjected to OFDM signal processing such as serial / parallel conversion, IFFT (Inverse Fast Fourier Transform) conversion, and CP insertion to generate an OFDM signal.

  Then, the transmission processing unit 207 outputs the generated OFDM signal to the wireless unit 209. In addition, when there is a response instruction for received data from the MAC control unit 219, the transmission processing unit 207 generates an ACK or NACK signal, places the generated signal on the physical downlink control channel (PDCCH), and transmits the radio unit 209. Output to.

  Radio section 209 up-converts data input from transmission processing section 207 to a radio frequency, adjusts transmission power, and transmits data from the transmission antenna. The radio unit 209 down-converts the radio signal received from the reception antenna and outputs it to the reception processing unit 211. The reception processing unit 211 performs FFT (Fast Fourier Transform) processing, decoding, demodulation processing, and the like on the signal input from the wireless unit 209. The reception processing unit 211 outputs physical uplink shared channel (PUSCH) data among the demodulated data to the reception HARQ processing unit 213. Further, the reception processing unit 211 receives response information (ACK / NACK), downlink radio quality information (CQI), and uplink radio quality information (CQI) of control data acquired from the physical uplink control channel PUCCH among the demodulated data. Transmission request information (scheduling request) is output to the MAC control unit 219.

  The reception HARQ processing unit 213 performs a decoding process on the input data from the reception processing unit 211, and outputs the data to the MAC information extraction unit 215 when the decoding process is successful. The reception HARQ processing unit 213 stores the data that has failed in the decoding process when the decoding process of the input data has failed. When receiving the retransmission data, the reception HARQ processing unit 213 combines the stored data and the retransmission data and performs a decoding process. Also, the reception HARQ processing unit 213 notifies the MAC control unit 219 of the success or failure of the input data decoding process.

  The MAC information extraction unit 215 extracts MAC layer control data from the data input from the reception HARQ processing unit 213, and outputs the extracted control information to the MAC control unit 219. The MAC information extraction unit 215 outputs the remaining data to the data processing unit 221. The data processing unit 221 has functions of a PDCP layer and an RLC layer, and performs processing such as a decompression function of a compressed IP header, a decryption function of encrypted data, and a division and combination of data. Return to. The data processing unit 221 divides the RRC message and user data, outputs the RRC message to the RRC control unit 223, and outputs the user data to the upper layer.

  The MAC control unit 219 has a MAC layer function, and controls the MAC layer based on information acquired from the RRC control unit 223 and lower layers. The MAC control unit 219 performs downlink and uplink scheduling processing. The MAC control unit 219 includes downlink transmission data response information (ACK / NACK), downlink radio quality information (CQI) and uplink transmission request information (scheduling request) input from the reception processing unit 211, and a MAC information extraction unit. Downlink and uplink scheduling processing is performed from the BSR input from 215 and the data amount information for each user acquired from the transmission data storage unit 203. The MAC control unit 219 outputs the schedule result to the transmission processing unit 207.

  Further, the MAC control unit 219 acquires response information for the uplink transmission data from the reception processing unit 211, and resends to the transmission HARQ processing unit 205 and the transmission processing unit 207 when the response information indicates NACK (non-response). Instruct. When acquiring the success / failure information of the data decoding process from the reception HARQ processing unit 213, the MAC control unit 219 instructs the transmission processing unit 207 to transmit an ACK or NACK signal.

  Further, the MAC control unit 219 performs activation / deactivation processing of a cell (or component carrier) allocated to the mobile station device 1-1, management of a transmission timing group, and the like.

  The RRC control unit 223 performs various settings for communication with the mobile station apparatus 1-1, such as connection / disconnection processing with the mobile station apparatus 1-1, carrier aggregation setting, transmission timing group setting, and the like. The information exchange with the upper layer accompanying the above is performed, and the lower layer control according to the various settings is performed.

  The RRC control unit 223 creates various RRC messages and outputs the created RRC messages to the data generation unit 201. The RRC control unit 223 analyzes the RRC message input from the data processing unit 221. When the RRC control unit 223 obtains a message indicating the transmission / reception capability of the mobile station device from the mobile station device 1-1, the RRC control unit 223 performs carrier aggregation suitable for the mobile station device 1-1 based on the transmission / reception capability information of the mobile station device. Set up. Also, the RRC control unit 223 outputs information necessary for the MAC layer to the MAC control unit 219 and outputs information necessary for the physical layer to the PHY control unit 217.

  Note that the transmission processing unit 207, the radio unit 209, the reception processing unit 211, and the PHY control unit 217 operate in the PHY layer, and transmit data storage unit 203, transmission HARQ processing unit 205, reception HARQ processing unit 213, MAC The information extraction unit 215 and the MAC control unit 219 perform operations of the MAC layer, and the data generation unit 201 and the data processing unit 221 perform operations of the RLC layer and the PDCP layer. The RRC control unit 223 operates the RRC layer.

[Description of operation]
A radio communication system is assumed in which the base station apparatus described in FIG. 9 and FIG. 10 allocates a plurality of cells to the mobile station apparatus, and the base station apparatus and the mobile station apparatus communicate with each other through the allocated cells.

  For a mobile station device that is not capable of transmitting to two or more uplink component carriers at the same time, the base station device sets carrier aggregation, and the mobile station device assigns a component carrier at each time according to an instruction from the base station device. A method of switching and transmitting data has been proposed.

  When the mobile station apparatus transmits data by switching the uplink component carrier every time according to the instruction from the base station apparatus during carrier aggregation, the base station apparatus transmits data while the mobile station apparatus switches the uplink component carrier If it is not known whether there is capability, the base station apparatus cannot instruct the mobile station apparatus to switch the component carrier.

  For this reason, the mobile station apparatus notifies the base station apparatus of information related to the transmission capability of the mobile station apparatus. The mobile station apparatus includes information on whether or not carrier aggregation is possible in the information on transmission capability, and further includes information on whether or not switching of uplink component carriers during carrier aggregation is possible. An example is shown below.

  The mobile station apparatus 1-1 notifies the base station apparatus 3 of information indicating whether or not frequency band information capable of uplink transmission and control of data transmission by switching uplink component carriers are possible. For example, when the mobile station apparatus 1-1 can perform carrier aggregation in the frequency band A and the frequency band B, and only switching control of uplink component carriers is possible during the carrier aggregation, the mobile station apparatus 1 The device 1-1 creates a message relating to the transmission capability of the mobile station device including at least information on the frequency band A, information on the frequency band B, and information indicating that uplink component carrier switching control is possible. To the base station apparatus 3.

  That is, the mobile station apparatus 1-1 transmits to the base station apparatus 3 frequency band information (Supported Band combination) indicating that the combination of the frequency bands A and B is supported. Further, the frequency indicating that the mobile station apparatus 1-1 can dynamically switch and transmit the uplink frequency bands of the frequency band A and the frequency band B included in the frequency band information according to an instruction from the base station apparatus 3 The switchability information is transmitted to the base station device 3. These pieces of information are obtained from the handover source base station device 3 (source base station device) to the handover destination base station device when the mobile station device 1-1 changes the base station device 3, that is, at the time of handover. 3 (target base station apparatus). Further, when the target base station device does not support switching of the uplink frequency band, the source base station device transfers only the frequency band information and does not need to transfer the frequency switchability information to the target base station device. Good.

  When the base station apparatus 3 receives the above message from the mobile station apparatus 1-1, the base station apparatus 3 can perform carrier aggregation in the frequency band A and the frequency band B by the mobile station apparatus 1-1, and further at the time of carrier aggregation. This operation is determined to be a mobile station apparatus that can be operated only by switching control.

  Note that the information indicating that uplink component carrier switching control is possible may be information such as 1-bit flag information indicating possible or impossible. In addition, when the mobile station apparatus 1-1 can perform carrier aggregation in the three frequency bands of the frequency band A, the frequency band B, and the frequency band C, and can perform switching control of the uplink component carrier, the mobile station apparatus 1- 1 creates a message including at least information including frequency band A information, frequency band B information, frequency band C information, and information indicating that only uplink component carrier switching control is possible. 3 to send.

  When the base station apparatus 3 acquires the above information from the mobile station apparatus 1-1, the base station apparatus 3 sets the carrier aggregation component carrier in the mobile station apparatus 1-1 according to the transmission capability of the mobile station apparatus. In addition, when the mobile station apparatus 1-1 can simultaneously transmit in two or more frequency bands during carrier aggregation, and further can perform switching control of uplink component carriers, whether or not carrier aggregation is possible as shown in FIG. 4. Information may also be notified to the base station apparatus 3.

  Alternatively, when the message related to the transmission capability of the mobile station apparatus includes information indicating that the combination information of the frequency band A and the frequency band B and information indicating that uplink component carrier switching control is possible, the base station apparatus 3 The mobile station apparatus 1-1 determines that transmission by switching control of the uplink component carrier in the frequency band A and the frequency band B is possible, and the combination information of the frequency band A and the frequency band B is included. When information indicating that link component carrier switching control is possible is not included, the base station apparatus 3 determines that the mobile station apparatus 1-1 can simultaneously transmit in the frequency band A and the frequency band B. May be.

  As another method, the mobile station apparatus 1-1 notifies the base station apparatus 3 of information on the frequency band of uplink transmission supported by the mobile station apparatus as separate information, and then switches the uplink component carrier. It may be possible to notify whether or not the switching control is possible, indicating that control is possible.

  For example, when the mobile station apparatus 1-1 can perform uplink transmission in the frequency band A and the frequency band B and can perform switching control of the uplink component carrier, as shown in FIG. Notifies the base station apparatus 3 of the frequency band A and the frequency band B as the frequency bands in which uplink transmission is possible, and then indicates whether or not switching control of the uplink component carrier is possible. To be notified. Note that a mobile station apparatus that cannot perform uplink component carrier switching control does not have to notify the availability information of uplink component carrier switching control.

  When the base station apparatus 3 receives the above message from the mobile station apparatus 1-1, the base station apparatus 3 performs the uplink transmission of the frequency band A, the uplink transmission of the frequency band B, and the switching control by the mobile station apparatus 1-1. It is determined that the mobile station apparatus is capable of carrier aggregation with the used frequency band A and frequency band B.

  In addition, when the mobile station apparatus 1-1 can perform simultaneous transmission in two or more frequency bands during carrier aggregation and can perform switching control of uplink component carriers, information on the frequency band of uplink transmission is further included. The base station apparatus 3 is notified of frequency band information capable of carrier aggregation.

  For example, the mobile station apparatus 1-1 can perform uplink transmission in the frequency band A and the frequency band B, and can simultaneously transmit uplink in carrier aggregation with the frequency band A and the frequency band B. When uplink component carrier switching control is possible, as shown in FIG. 6, mobile station apparatus 1-1 has frequency band A, frequency band B, “frequency band A and frequency band B as frequency bands that can be transmitted in uplink. ”Is notified to the base station apparatus 3 and then the switching control permission / inhibition information indicating that switching control of the uplink component carrier is possible is notified.

  When the base station apparatus 3 receives the message from the mobile station apparatus 1-1, the base station apparatus 3 uses the frequency band A uplink transmission, the frequency band B uplink transmission, and the frequency The mobile station apparatus is determined to be capable of carrier aggregation with the band A and the frequency band B.

  When the mobile station device 1-1 has a plurality of transmission units including a radio unit, the mobile station device 1-1 switches from one component carrier frequency band to another component carrier frequency band to perform transmission processing. Since this is done, the processing time is short. However, when the mobile station apparatus 1-1 does not have a plurality of transmission units including the radio unit, the mobile station apparatus 1-1 spends time to switch frequencies, and the uplink grant from the base station apparatus 3 You may not be able to send even if you get. Therefore, the mobile station apparatus 1-1 may further notify information on whether or not it takes a frequency switching processing time for uplink component carrier switching.

  When the base station device 3 receives information from the mobile station device 1-1 indicating that it takes time to switch the frequency, the base station device 3 takes the uplink component carrier switching time into account for the mobile station device 1-1. Perform scheduling.

  Operations of the mobile station apparatus 1-1 and the base station apparatus 3 will be described. The mobile station apparatus 1-1 is a mobile station apparatus that is not capable of transmitting to two or more uplink component carriers at the same time. However, carrier aggregation is possible in the frequency band A and the frequency band B, and the carrier aggregation is performed. The mobile station apparatus is capable of only uplink component carrier switching control.

  The mobile station apparatus 1-1 performs a cell search and finds one cell (here, cell 1) of the base station apparatus 3. The mobile station apparatus 1-1 receives the broadcast channel PBCH and the like of the cell 1, and acquires the system information of the cell 1 (such as the physical channel configuration and random access information of the cell). And the mobile station apparatus 1-1 performs a random access procedure using the random access information contained in system information for initial access.

  After the random access procedure is completed, the mobile station device 1-1 and the base station device 3 perform various setting procedures for connection. During various setting procedures for connection, the mobile station apparatus 1-1 notifies the base station apparatus 3 of information related to the transmission / reception capability of the mobile station apparatus. The information on the transmission / reception capability includes information on the frequency band of uplink transmission as described above and information on whether or not to control switching of component carriers. Here, the mobile station apparatus 1-1 has the transmission capability of the mobile station apparatus including at least information indicating that frequency band A information, frequency band B information, and uplink component carrier switching control are possible. The base station apparatus 3 is notified of the information regarding.

  When the base station device 3 receives the information on the transmission / reception capability of the mobile station device 1-1 from the mobile station device 1-1, whether or not carrier aggregation is possible from the information on the transmission / reception capability of the mobile station device 1-1, and Identifies whether uplink component carrier switching control is possible. When the base station apparatus 3 sets an additional cell (here, cell 2) for performing carrier aggregation, the base station apparatus 3 performs the cell 1 for the mobile station apparatus that can perform only uplink component carrier switching control. In addition, uplink scheduling is performed in consideration of simultaneous transmission in two cells of cell 2. The base station apparatus 3 notifies the mobile station apparatus 1-1 of an uplink grant, which is uplink scheduling information, through the downlink control channel PDCCH.

  The mobile station apparatus 1-1 receives the carrier aggregation setting from the base station apparatus 3 and adds the cell 2. When receiving the uplink grant addressed to the mobile station device from the downlink control channel PDCCH of the cell 1 or the cell 2, the mobile station device 1-1 switches the uplink component carrier based on the scheduling information of the uplink grant. Transmit data on the uplink.

  When the base station device 3 erroneously transmits an uplink grant indicating simultaneous transmission on two or more uplink component carriers, the mobile station device 1-1 discards the uplink grant, or Uplink data is transmitted on one of the uplink component carriers indicated by the uplink grant. For example, the mobile station apparatus 1-1 may prioritize the uplink grant for the uplink component carrier of the first cell.

  As described above, the mobile station apparatus 1-1 notifies the base station apparatus 3 of the transmission capability information of the mobile station apparatus, so that the base station apparatus 3 is based on the transmission capability information of the mobile station apparatus. −1, efficient carrier aggregation setting and uplink scheduling can be performed.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  In the embodiment, a mobile station device is described as an example of a terminal device or a communication device, but the present invention is not limited to this, and is a stationary or non-movable electronic device installed indoors and outdoors. For example, it goes without saying that the present invention can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other daily life equipment.

  Further, for convenience of explanation, the mobile station device 1-1 and the base station device 3 of the embodiment have been described using functional block diagrams, but the functions of the respective units of the mobile station device 1-1 and the base station device 3 or these functions A program for realizing a part of the above functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, whereby the mobile station apparatus and the base station apparatus Control may be performed. The “computer system” here includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, it is intended to include those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. .

  Each functional block used in each of the above embodiments may be realized as an LSI that is typically an integrated circuit. Each functional block may be individually formed into chips, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope of the present invention are also within the scope of the claims. include.

1-1 to 1-3 Mobile station apparatus 3 Base station apparatuses 101 and 201 Data generation unit
103, 203 Transmission data storage unit 105, 205 Transmission HARQ processing unit 107, 207 Transmission processing unit 109, 209 Radio unit 111, 211 Reception processing unit 113, 213 Reception HARQ processing unit 115, 215 MAC information extraction unit 117, 217 PHY control 119, 219 MAC controller 121, 221 Data processor 123, 223 RRC controller

Claims (7)

A wireless communication system in which a base station device and a terminal device communicate with each other,
The terminal apparatus includes frequency band information indicating a combination of frequency bands that can be transmitted, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus. The transmission capability information of the terminal device including the base station device,
The base station apparatus sets a carrier aggregation to be used by switching the plurality of uplink frequency bands to the terminal apparatus based on the transmission capability information. A base station device that communicates with a terminal device,
Frequency band information indicating a combination of frequency bands that can be transmitted from the terminal apparatus, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus. Receive the transmission capability information of the included terminal device,
A base station apparatus configured to set carrier aggregation to be used by switching the plurality of uplink frequency bands to the terminal apparatus based on the transmission capability information. A terminal device that is assigned a plurality of cells from a base station device and communicates with the base station device,
Frequency band information indicating a combination of frequency bands that can be transmitted to the base station apparatus, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus A terminal device characterized by notifying transmission capability information of a terminal device including The terminal device according to claim 3,
A terminal device that notifies transmission capability information related to processing time of frequency switching. A wireless communication method applied to a wireless communication system in which a base station device and a terminal device communicate with each other,
The terminal apparatus includes frequency band information indicating a combination of frequency bands that can be transmitted, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus. A step of notifying the base station device of transmission capability information of a terminal device including:
The base station apparatus includes at least a step of setting carrier aggregation to be used by switching the plurality of uplink frequency bands to the terminal apparatus based on the transmission capability information. An integrated circuit applied to a base station device that communicates with a terminal device,
Frequency band information indicating a combination of frequency bands that can be transmitted from the terminal apparatus, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus. Means for receiving the transmission capability information of the included terminal device;
An integrated circuit comprising: means for determining whether to set carrier aggregation for the terminal device based on the transmission capability information; and means for setting carrier aggregation for the terminal device. An integrated circuit applied to a terminal device that is assigned a plurality of cells from a base station device and communicates with the base station device,
Frequency band information indicating a combination of frequency bands that can be transmitted to the base station apparatus, and frequency switching availability information indicating whether a plurality of uplink frequency bands indicated by the frequency band information can be switched according to an instruction from the base station apparatus An integrated circuit comprising means for notifying transmission capability information of a terminal device including